Improvement in machine tor grinding seats of valves



animi gaat am l auf Letters Patent N 96,378, dated November 2, 1869.

IMPROVEMENT IN MACHINE ron GRINDINGYSEATS or' vALvEs.

The Schedule referred to in these Lettera Patent and making par: oi the same.

To all whom 'it may concern Be it known that I, WILLrAM H. ANDERSON, of the city of Brooklyn, county of Kings, inthe State of N ew York, have invented a new and usefulMachine for Grinding the Seats of Valves, Cocks,Faucets, 86o.

My' invention consists in the novel construction,

arrangement, and operation of certain mechanical devices, by means of which the seats of valves, and other similar articles, may be rapidly and accurately ground toa perfect bearing; and I do hereby declare that the following specification, taken in connection with the drawings furnished, and forming a part of the same,

is a true, clear, and exact description thereof. Referencebeing hadl to the drawings- Figure 1 represents one of my machines in perspective.

A represents a pipe, to which thecockto he ground is attached, by means of its screw-connections. When 'the machine is used upon new work, a bolt or rod,

lwith a suitable screw-thread thereon, would take the place of the pipe, asl shown in the drawings.

B is the valve-cock, with a portion of its shell removed. Its parts are well known, and too common to require special explanation.

B B represent the seat of the valve.-

C is a clamp, vby meansof which the machine is attached to the pipeA. It is in the form of a crescent, and is provided with two clamp-screws, passing through tapped holes in the ends of the horns of the crescent.

On the ends of these clamp-screws D are forked holders D D, the two coming together near the centre. The holders D D are attached to the clampfscrews D, by means of a socket-joint, so that they may readily adapt themselves to the surface ofthe pipe, regardless of any variations which may exist inthe formor surface of the pipe.

E is a slide-bar, firmly attached to the clamp C.A At the point of connection therewith, it is provided with an arm, E E, extending at right angles tothe bar.

l is an adj usting-screw, passing through a tapped hole at the-lower end ofthe arm E E. lt is provided with a foot similar in form tothe holders D D, already described.

G is a lathe-head, fitted and secured to the slide-bar E, by means of a slot in its foot. It can be adjusted longitudinally, by means of a set-screw, G G, passing through the under side of the foot, 'and bearing againstl the under side of the slide-bar.

H is a lathe-spindle, fitted to revolve freely in the lathe-head. j

I is a crank, attached to the spindle H.

K is a pulley, mounted-.loosely upon the spindle. It is provided with a hub, through which a set-screw passes, to admit of longitudinal adj ustment. j

L is a pressure-spring, encircling the spindle, and

arranged to press at one end against the pulley K, and

agaiust one of the ears of the lathe-head at the other end. It isob'vious, that by moving the pulley toward or from the spring, and securing it tothe/spindle, pressure, longitudinally, more or less, -is effected.

M is a set-screw dog, of peculiar construction. It is provided with a double or pronged finger, in order that it'may grasp or embrace either thespoke of a stem-wheel of a cock or'the lever of a faucet, and securely hold it while revolving in any direction.

Figure 2 represents one of my machines. in longitudinal vertical section.

The respective parts are lettered, as in fig. l. The operation of my machine is as follows: supposing, by way of illustration, that a valve-cock, from being long in use, should require regrinding, and

that it were neither desirable nor convenient to'remove it from the pipe to which it was attached. The machine would be placed upon the pipe, at a proper d istance from the cock, by means ofthe clamp G, screws D, and holders D D. The point or centre ofthe lat-hespindle is then placed `in a proper relation with the centre of the valve-stem. Should the valve-stem be out-of line with the screw-connections in the body of the cock, the centres may be adjusted thereto, by elevating or depressing theslide-bar E, by means of the adjusting-screw F, after which the setscrew G G should be turned up tightly, to secure the..lathehead n in propei` position. lhe dog M should thenV beladjusted to a spoke of the stem-wheel. The screwcoupling of 4the cock should then-be turned outward uponthe spindle or stem, so that the stem may be" permitted to freelyB revolve. A'proper quantity of oil and emery, or other suitable grinding-material, should rthen be placed upon the valve-seat, and the surfaces ground, by Vturning the hand-crank, or by means of the pulley, to whicha bow-cord should be applied.

The degree of pressure upon the'grinding-surfaces can be readily varied, by adjustment of the pulley,

relatively to the pressure-spring, so that it may bear,

more or less forcibly, against it.

It is well known to persons skilled in the art, that the screw-connections of valve-cocks and faucets are seldom cut at true right angles to or parallel with theV stems of the cocks. It is therefore necessary .to have a valve-grinding apparatus adjustablein suoli a manner,

that the frequent variations'therein can be thoroughly compensated, by adjusting the lathe-spindle, so that it will be, when operated, on a true line with the outer end of the valve-stem, and its proper seat.

This adjustment may be eected by having a lathehead mounted upon a stationary slide-bar, but arranged to tilt up and, down, longitudinally, in av socket-joint, and secured, by setecrewa .in4 any desired position.

I prefer, however, the arrangement of the adjustable slidelbar.

It might, however, be deemed advisable t0 construct both slidebar and lathe-head so as to be capable of vertical longitudinal adjust-ment, in which case it could be readily accomplished, by modifications clearly within the spirit of my rvention.

Although the drawing exbibits,.:md I have described, a portable grinding-inachine, it is obvious that changes, involving a' mere mattei' of construci-ion, are only requisite to adapt it to general use, by rassfinishers, in the mnnufzwture of new cocks, 85o.

Having thus described my invention,

1 claim as new, and desire to secure by Letters Patent- 1. In combination with a vertical or horizontal stand or pipe, A, the slide-bar E, to which is fitted a 4lathe-- head and spindle, substantially as shown and described.

2. In combination with' the sliding bar, lathe-head, and spindle H, the pressure-spring L, arranged to act upon the spindle longitudinally, substantially as shown and described.

3. In combination with an` adjustable slidingbar, lathe-head, and spindle, the clamp C, with its clampscrews D, substantially as shown and described, for

the purposes specified.

WILLIAM H. ANDERSON.

Witnesses:

WILLIAM R. TAYLOR, GEORGE W. HALL. 

